448 not charging battery
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It could be a bad regulator or a bad ignition switch. If you have a multimeter check the AC voltage on the two wires from the stator that connect to the regulator and see if you have around 28 V when the engine is running--that means that the stator is working. Then measure the DC voltage at the battery with the engine running and it should be above 12.5 v if the regulator is working. If not, the problem could be that the internal connections in the switch are bad and are not letting the regulator "see" the battery voltage or the regulator itself could be bad. More information on the engine model and type of regulator as well as the year/SN of the tractor would be helpful.
Wow..Thanks for the quick response.. I'm not sure where the regulator is on this tractor. I changed the rectifier once long ago and it fixed the problem. It cost close to $60 about 6 years ago, I am not so sure it would fix the problem this time,so I'm reluctant to buy it to try it.
The tractor is a 1987 25 anniversary 448 s/n 14113713
Thank you
Dave
The tractor is a 1987 25 anniversary 448 s/n 14113713
Thank you
Dave
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2,580 Posts
Replace the ignition switch with a genuine Ingersoll part. Very common problem and that is usually the fix.
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2,551 Posts
Let me suggest a slightly different path for this one.
First, start with measuring the battery voltage while the tractor is running at half throttle, with the headlights off. Is it above 12.7 volts?
If above 12.7 volts and the light stays on, then the voltage sensor is bad ... a fairly common problem ... or a wiring problem to the voltage sensor. That's C30265, $22.79 and available for immediate shipment.
If below 12.7 volts, then either the battery (could be), rectifier (common failures), or something in the generator is wrong (uncommon).
All true comments about the ignition switch also, but I don't think this will be the cause of an Onan keeping the charge light on ...
Get parts at your local Ingersoll dealer, or if you care to, drop an eMail off my ID to get them mailorder.
First, start with measuring the battery voltage while the tractor is running at half throttle, with the headlights off. Is it above 12.7 volts?
If above 12.7 volts and the light stays on, then the voltage sensor is bad ... a fairly common problem ... or a wiring problem to the voltage sensor. That's C30265, $22.79 and available for immediate shipment.
If below 12.7 volts, then either the battery (could be), rectifier (common failures), or something in the generator is wrong (uncommon).
All true comments about the ignition switch also, but I don't think this will be the cause of an Onan keeping the charge light on ...
Get parts at your local Ingersoll dealer, or if you care to, drop an eMail off my ID to get them mailorder.
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